Shutter for photographic cameras



(No Model.) Y

W. E. ROBERTS.

SHUTTER POR PHOTOGRAPHIG CAMERAS.. .Y No. 362,663. Tatented May 10,1887.

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w1/vw INVBNTOR:

ATTORNEYS.

N. PETERS, Phoo-Uwgrapber. Washington. D. CV

UNITED STATES PATENT OEEICEo WESLEY EATON ROBERTS, OF HARTFORD,KENTUCKY. l

SHUTTER FOR PHOTOGCRAPHIC CAMERAS.

SPECIFICATION forming part of Letters PatentNo. 362,663, dated May l0,1887. Application tiled December 15, 1886. Serial No. 221,595. (Nomodel.)

To all whom, it may concern:

Be it known that l, WEsLEY EATON RoB- ERTs, of Hartford, in the countyof Ohio, and State of Kentucky, have invented new and usefulImprovements in Shutters for Pho tographic Cameras, ofwhich thefollowing is a full, clear and exact description.

This invention relatesy to camera-shutters made up of two pivoted partsor sections conh trolled as regards their opening movement, which isaway from each other, by a hand-bulb pneu matic attachment; and theinvention consists in novel means for communicating motion from thepneumatic attachment to the divided shutter, and for securing a closeaction to said shutter and holding it closed when shut.

Reference is to be had tothe accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in both figures.

Figure l is an interior view of the front end ofa camera with myinvention applied, and Fig. 2 a transverse section of the same upon theline x x in Fig. 1.

A is the front end of the camera, in the front board, b, of which is theusual aperture, c, for passage of the light as transmitted through thelens or lenses carried by the tube B, as usual.

CC are the two sections of the divided dropshutter, pivoted above, as atd d, to the board b, on its inside, and meeting, when closed, by anoverlapping vertical joint in central transverse relation with theaperture c, and having the pivots d cl so arranged that the'shuttersections, when free, close by their own weight within a keeper,D, at theirlower ends. This keeper has astop or partition, u, across itin the meeting line of the shutter-sections, and the shutter-sectionshave notches c in their lower ends, so that when said sections cometogether the partition u in the keeper D will stop them, and at the sametime allow them to close perfectly tight. Fig. l shows by full lines thedivided shutter as fully open, and by dotted lines the same as closed.

The board b is independent of the headblock or front board, b, of thecamera, and may be secured by screws to the latter on its inside, asshown in Fig. l, whereby said shutter-carrying board b may be attachedand detached at pleasure.

The shuttersections C C are more orl less opened, as required, and for alonger or less period to give the necessary exposure for the taking ofthe picture, by squeezing with the hand upon an elastic bulb, E, of apneumatic attachment, such action causing the air in the bulb to becompressed and to be forced along a tube, F, and within a smallcylinder, G, iitted on the outer end of said tube, andsecured on thetopof the forward end portion of the camera-box, over the divided shutter.L This cylinder G is fitted with a plunger, H, that, as the air iscompressed in rear of it by squeezing of the handbulb E, is forcedoutward and caused to ,open the shutter-sections from over the aperturec by pulling upon a cord, e, secured to an arm, f,

. upon the plunger, and which, passing through the top of thecamera-box, is connected by a hook, g, and loop 7L with a doubled ordivided cord, c', that, passing through an eye or guide, s, inside ofVthe camera, is attached to the shutter-sections OC upon the off side oftheir pivots or fulcrums. The hook-and-loop connection g h between thecords e e', which virtually form but a single cord, provides for theconvenient and ready attachment and detachment ofthe shutter-sections CC when required.

\V.hen hand-pressure is removed from the elastic bulb E, then theplunger H returns to its normal inward position and the shuttersectionsC C drop and close, as shown by dotted lines in Fig. l.

lf it is desired to keep the shutter-sections open for any veryprolonged period of time, a clamp of any suitable kind may be applied tothe tube F, to retain the compressed air back of the plunger H.

When the divided shutter is closed, light is effectually excluded fromentering the camera through the lens-tube and aperture c.

To prevent any rebound of the shutter-sections as they are closed orbrought together, a latch, I, is p'ivoted, as at t', to the oneshuttersection and made to automatically engage with apin or catch, k,upon the other shutter-section, and so keep the two shuttersectionsclosed as they come together. This latch works within a staple, Z, thatserves to guide it'and form a rest or support for it. Furthermore, saidlatch is connected by a cord, m, with the cord or cords e e', or, ifdesired, directly with the plunger H, so that when the divideddrop-shutter is opened said latch will be simultaneously IOO raised orlifted from its engagement with the catch and adjusted or turned to aposition out of the Way of any interference with the aperture c of thecamera, as shown by full lines :in 5 Fig. 1.

The support for the lens-tube may be suitably constructed, if desired,to provide for a carriage adjustment of said tube. To provide for thisthe boards b L are made, when secured 1o the one upon the other, to givea combined thickness which will admit of the carriage movement of thelens/tube.

Having thus fully described my invention7 what I claim as new, anddesire to secure by 15 Letters Patent, is*

1. The combination, with a caineralsliutter composed of two independentpivot-ed risingand-i'alling sections, G C, and with the lexible air bulband tube F, of the cylinder G, plunzo ger H, and the cords oreordseetions e e', snb

stantially as spceilied.

2. The combination, with the camera-box having an exposingaperture inits Vforward end, oi" the pendent shutter-sections C C, the

25 keeper D, the cords or cord-sections e e, the

ter-sections and means, substantially as de- 3o scribed, for opening thesaine, of an automatically-closing latch carried by the oneshuttersection and adapted to engage with a catch upon the othershutter-section, and a cord or connection between said latch and saidshutter-opening means, essentially as specified, whereby theshutter-sections are kept from rebounding when closing and the latch isreleased and adjusted ont of the way simulta neonsly with the opening ofthe divided dropsliutter, as set forth. l

4L. The combination, with the pendent sl1utter-sections G C and thecords or cordseetions e e', adapted to open the divided drop-slint ter,ofthe cord m, the latch l, and the catch In, 45 substantially as shownand described.

WESLEY EATON ROBERTS. XVitnesses:

T. M. SMITH, Ir-mins ANDERSON.

